US307640A - Tripod for rock-drills - Google Patents

Description

(No Model.)

G. M. GITHENS. i TRIPOD FOR ROCK DRILLS; No. 307,640. Patented Nova 4, 1884.

Orrrc "illii l GEORGE M. GITHENS, OF BROOKLYN, NEV YORK.

TRIPOD FOR ROCK-DRILLS.

SPECIFICATION forming part. of Letters Patent No. 307,640, dated November 4, 1884.

Application filed February 18, 1884. (No model.)

To aZZ whom, it may concern:

Be it known that I, GEORGE M. Grrnnns, of Brooklyn, in the county of Kings and State of New York, have invented an Improvement in Tripods for Rock-Drills, of which the following is a specification.

This invention is made for giving greater facilities than heretofore for moving the logs into diflorent positions and securing the same in the most firm and rigid manner, so that the rock-drill cylinder held thereby can be placed in any desired position in relation to such tripod.

In the drawings, Figure l is an elevation, partly in section, of the tripod and hub. Fig. 2 is a plan of the joints at the upper ends of the tripod. Fig. 3 is a side view, partially in section, of the same; and Fig. i is a sectional side elevation of the tripod and hub of the steam rock-drill in smaller size.

The two front legs, A B, and the rear leg, 0, are each made as atube, with an extensioirrod, d, therein that may be set at any desired length and clamped by the bolt 0 in the band f, and usually there are movable weights that can be placed upon the legs to keep the instrument from moving under the reciprocation of the drill. These parts are of ordinary character, except that the upper end ofeach tube is forged solid with a bolt or bar inserted into the tube, the exterior being tapering or conical, and provided with a screw and nut at the end, and each socket is tapering, so that the end of the tubular leg fits firmly therein, and the concussion will not produce any looseness of the leg in its socket, as the parts wedge tightly together and the nut is set up from time to time. i

The cylinder of the steam rock-drill is provided with a cylindrical hub, 12, around the pe riphery of which is a groove, and the split band H is adapted to fit around this hub o. The bolt h,that is used to clamp this split band to the hub, is passed across so as to enter this groove at one side,thereby preventing the ring separating from the hub, but allowing the hub to be turned around in the ring H.

At the sides of the split band H there are the hubs 71, with circular conical recesses for the reception of similar-shaped projections k upon the link-pieces It.

through these link-pieces, and by screwing the The bolt h passes same up the link-pieces it are clamped in the faces of the links k, so as to make a very firnr connection for the back leg when the bolt m is tightened up. Each link It: is provided with a cylindrical projection or trunnion at one side, around the bolt 71, and this is grooved peripherally. The socketso and 0 of the front legs are provided with split bands 1) p, adapted to fit around the respective trunnions, the clamp-screws r r of the respective split bands pass at one side into the peripheral groove, so as to prevent the parts separating, and by tightening such bolts after the respective legs have been moved to their places the splitbands will clamp the trunnions in the mostfirm and reliable manner.

I do not claim either of the separate parts, as I am aware that a split band with abolt has been applied to a screw-head grooved circun1- i'erentially, and I am aware that wooden legs have been tapered and made with a screw at the end, and that tubular legs have been used. By my improvement the clamping-screw is made to hold the clamp upon the trunnion, to clamp the trunnion, and to clamp the links I simultaneously.

I claim as my invention 1. The con'ibination, with the hub or trunnion with aperipheral groove for supporting the rock-drill, of a split band, aclamping-bolt passing across at the open portion of such split band and into the peripheral groove of the trunnion, and links through which such bolt passes, and the legs and connecting-pieces between the legs and the respective links and bolts, substantially as set forth.

2. The combination, with the split ring H and the bolt h, of the links 75 k, through which the bolt it passes, the leg 0, connected to such links, the trunnions upon such links,the sockets 0 0, the legs A B, fitting such sockets, the

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split rings 1) p, and the bolts 1 1-, substantially I in combination with aspl it band and a clampzts set forth. ing-bolt passing through the split bend and 3. The tubular metallic tripod-legs, each intotheperipherztlgroove,forholding-the split 15 closed atits upper end and made conical, and band to the trunnion,theli11ks,the connections 5 terminating with a screw and nut, in combinabetween the legs and links, and the bolts for tion with the conical metallic sockets through clamping the some, substantially as set forth. which the closed portions of the legs pass, and Signed by me this 13th day of February, A. are held by the nuts, and the connections bel D. 1884.

tween the sockets, substantially as set forth. I GEO. M. GITHENS. IO 4. The trunnion having aperipheral groove Vitnesses: I

and forming a support for the rock-drill and GEo. T. PINOKNEY, its connected parts, and the legs for such drill, I WILLIAM G.- MoTT.

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